Devices and Methods for Kickback-Offset Display Turn-Off

1. A method for reducing the effect of kickback voltage when turning off an electronic display comprising: determining an amount of kickback voltage that is expected to occur in pixels of the electronic display during shutdown of the display; supplying a common voltage output to a common electrode of a pixel of the electronic display; supplying an activation signal to the pixel to activate the pixel; supplying a data signal to a pixel electrode of the pixel during a period in which the activation signal is being supplied to the pixel, wherein the data signal is substantially equal to the sum of the common voltage output being supplied to the common electrode and the determined kickback voltage; and removing the activation signal from the pixel during a period in which the data signal is being supplied to the pixel to store the data signal in the pixel to reduce the effect of kickback voltage on the pixel electrode of the pixel during shutdown of the electronic display.

2. The method of claim 1 , wherein determining the amount of kickback voltage that is expected to occur in pixels of the electronic display comprises obtaining the amount of kickback voltage from a storage device.

3. The method of claim 1 , wherein determining the amount of kickback voltage that is expected to occur in pixels of the electronic display during shutdown of the display comprises measuring a kickback voltage of a dummy pixel.

4. The method of claim 1 , wherein the common voltage output is ground and the data signal is substantially equal to the determined kickback voltage.

5. The method of claim 1 , wherein removing the activation signal from the pixel during the period in which the data signal is being supplied causes the pixel electrode voltage to be substantially equal to the common voltage output.

6. An electronic display comprising: a plurality of pixels, each pixel having a common electrode and a pixel electrode; a common voltage source configured to supply a common voltage output to the common electrodes of the pixels; a gate driver configured to supply activation signals to the pixels to activate the pixels; a source driver configured to supply data signals to the pixel electrodes when the pixels are activated; and display control circuitry configured to determine an amount of kickback voltage that is expected to occur in pixels of the electronic display during shutdown of the display; wherein, when the display is to be turned off, the display control circuitry is configured to determine the amount of kickback voltage that is expected to occur in pixels of the electronic display during shutdown of the display, the common voltage source is configured to supply the common voltage output to the common electrodes of the pixels, the gate driver is configured to supply the activation signal to the pixels to activate the pixels, the source driver is configured to supply data signals that are substantially equal to the sum of the common voltage output supplied to the common electrode and the determined kickback voltage, and the gate driver is configured to remove the activation signals from the pixels while the data signals are being supplied to the pixels to store the data signals in the pixels.

7. The electronic display of claim 6 , wherein the display control circuitry is configured to determine an amount of kickback voltage that is expected to occur in pixels of the electronic display during shutdown of the display by measuring a kickback voltage of a dummy pixel, or by varying the common voltage output of the electronic display until screen artifacts are reduced, or both.

8. The electronic display of claim 6 , wherein removing the activation signal from the pixel while the data signal is being supplied causes the pixel electrode voltage to be substantially equal to the common voltage output.

9. An electronic device comprising: an electronic display configured, when the electronic display is to be turned off, to supply data signals to pixels and remove activation signals from the pixels while the data signals are being supplied to the pixels to store the data signals in the pixels, wherein the data signals are substantially equal to the sum of a common voltage output to a common electrode of the pixels and a determined kickback voltage; and data processing circuitry configured to control the electronic display by determining when the electronic display is to be turned off and determining the amount of kickback voltage.

10. The electronic device of claim 9 , wherein the determined kickback voltage is the amount of kickback voltage that is expected to occur in pixels of the electronic display during shutdown of the display.

11. The electronic device of claim 9 , comprising a dummy pixel not on an active portion of the display.

12. The electronic device of claim 11 , wherein the dummy pixel comprises an activation input line, a data input line, and a data output sense line.

13. The electronic device of claim 12 , wherein the data processing circuitry is configured to determine the amount of kickback voltage by applying an activation signal to the activation input line, applying an input data signal to the data input line, removing the activation signal from the activation input line, measuring an output data signal at the data output sense line, and calculating the difference between the input data signal and the output data signal.

14. The electronic device of claim 9 , wherein the data processing circuitry is configured to determine the amount of kickback voltage by varying the common voltage output of the electronic display until screen flicker is reduced.

15. The electronic device of claim 9 , wherein the electronic display is configured so that after the activation signals are removed, the pixel electrodes store a voltage substantially equal to the common voltage output.

16. Non-transitory machine-readable media having instructions encoded thereon for execution by a processor, the instructions comprising: instructions configured to determine when to shut down an electronic display; instructions configured to determine an amount of kickback voltage that is expected to occur in pixels of the electronic display during shutdown of the display; and instructions configured to cause, when the display is to be shut down, a common voltage output to be supplied to common electrodes of a plurality of pixels of the electronic display, activation signals to be supplied to the pixels to activate the pixels, data signals to be supplied to pixel electrodes of the pixels, and the activation signals to be removed from the pixels while the data signals are being supplied to the pixels to store the data signals in the pixels, wherein the data signals are substantially equal to the sum of the common voltage output to the common electrodes and the determined kickback voltage.

17. A method comprising: determining an amount of kickback voltage that is expected to occur in pixels of an electronic display during shutdown of the display; turning off a first line of pixels by: supplying a common voltage output to a common electrode of the first line of pixels of the electronic display; supplying a first activation signal to a first gate line to activate the first line of pixels; supplying data signals to pixel electrodes of the first line of pixels; and removing the first activation signal from the first gate line while the data signals are being supplied to the pixels to store the data signals in the first line of pixels, wherein the data signals are substantially equal to the sum of the common voltage output to the common electrode and the determined kickback voltage; and turning off a second line of pixels by: supplying the common voltage output to the common electrode of the second line of pixels of the electronic display; supplying a second activation signal to a second gate line to activate the second line of pixels; supplying data signals to pixel electrodes of the second line of pixels; and removing the second activation signal from the second gate line while the data signals are being supplied to the pixels to store the data signals in the second line of pixels, wherein the data signals are substantially equal to the sum of the common voltage output to the common electrode and the determined kickback voltage.

18. The method of claim 17 , wherein turning off the first line of pixels occurs prior to turning off the second line of pixels.

19. The method of claim 17 , wherein turning off the first line of pixels occurs at substantially the same time as turning off the second line of pixels.

20. The method of claim 17 , comprising turning off the first line of pixels, the second line of pixels, and all other lines of pixels of the electronic display at substantially the same time.

21. The method of claim 17 , wherein the common voltage output is ground and the data signals are substantially equal to the determined kickback voltage.